Boiler-furnace



haS aIWays ooInninglod With it muoh foroign 1I1otter Whioh being lT1elted by tho intenso heot for11S suoh halfd oHnkers that it haS boen dion1t to rotate the grato bars. In my said ea1ioI oonstruotion, thoy oloSf of ooorso be of ooInparatively great length and 1thongh thoy are proteoted by the jookot of oindorS and ashes, yet at tho Samo timo they re liable on aooonnt of their length to be bent and warped by the Weight esting upon then]. Therefore, in ordor to obviajte thoSe diioul ties and to provont Suoh vrping and bend ing and in order to render it n1uoh eSier for the a ttendant to rotte these bS for the oruShing of the oinderS I have as aforeSaid arranged tho brS 1ongifudinany of the for naoe, they being now fouI' in nunbof and of felativoly III1oh Shorter longth and II1oro o pablo of Withstanding tho weigho nd of bo ing Tota ted. In ordor to Support thoI properly, I forIn 1rge bearingS for tho111in the heafth B Whioh latter prt of the Struoture iS also materiHy nlodif[ed in oon1porison With that in my ear1ier fufDaoe. It iS oarried in to a line oonsiderably beyond the vall of the aroh E and WeH under the front end of the boi1e1' the resoIt being that the onrrentS of ooInbustion produots are iLnmediately de- Heoted npWard away from the region of the gfate barS and ogoinSt the nndeE Bido of the 3o front end of the boner, and do not tend, aS in the oarlier oonsfrnotion, to floW along the boftom oI' flooI, of tho firo ohaLnber undof the boiler.

vhat I olaiD1 iS In a (1ovv1 draft Sn1oke oonSuning furnaoo, the oombination of the inner aroh E Supporting the boiler, tho outeI' or front Wan B, the relatively naJrrow vel'tioal fne1 dnot betWeon tho front WaH B nd tho aroh and oommoni oating vvith tho longitodinaI oombustion ohan1ber beneth the aroh, the relatively shorb rotry grate barS Sitnated longitudi nany of the boilof and having tlleir ooter ends nlonnted in nd rojeotfng thfough the front Wan B, nd tbo heofth foroled with bearing aportnreS for the inner ends of tho Short grate borS, Said heaarth E oxtending be yond tho inner fa,oo of the aroh and lying dieof1y below the boiIer, SubStalntiauy os Sot orth.

In testimon Whereof I X m Si nturo in preSenoe of tWo WitneSSes.

JOSEPH LISTEB. 

